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• Connect 18 AWG or similar wire to the two terminals provided
in the enclosure and run the wires from the sensor to the
control . Do not run the wires parallel to telephone or power
cables . If the sensor wires are located in an area with strong
sources of electromagnetic interference (EMI), shielded cable
or twisted pair should be used or the wires can be run in a
grounded metal conduit . If using shielded cable, the shield
wire should be connected to the Com terminal on the
control and not to earth ground .
• Replace the cover of the sensor enclosure .
• Connect the 2 wires from the outdoor sensor to the Out
Sens terminals on the 294 (terminals 4 and 5) .
Mounting the Universal Sensors
These sensors are designed to mount on a pipe or in a
temperature immersion well.
The Universal Sensor should be placed downstream of a pump
or after an elbow or similar fitting . This is especially important if
large diameter pipes are used as the thermal stratification within
the pipe can result in erroneous sensor readings . Proper sensor
location requires that the fluid is thoroughly mixed within the
pipe before it reaches the sensor .
Strapped to Pipe
The Universal Sensor can be strapped directly to the pipe
using the cable tie provided . Insulation should be placed
around the sensor to reduce the effect of air currents on the
sensor measurement .
Immersion Well
If a Universal Sensor is mounted onto 1" diameter L type cop-
per pipe, there is approximately an 8 second delay between a
sudden change in water temperature and the time the sensor
measures the temperature change . This delay increases con-
siderably when mild steel (black iron) pipe is used . In general,
it is recommended that a temperature well be used for steel
pipe of diameter greater than 1
recommended when large diameter pipes are used and fluid
Condensate Sensor (Terminals 6, 7)
The included Universal Sensor 071 measures the condensate return temperature . This sensor should be
installed on the return on the furthest radiator or on the condensate return line in the mechanical room .
• Connect the wires to the condensate sensor terminals 6 and 7 .
8
⁄
" . Temperature wells are also
1
4
S1
S1
stratification is present . If the well is not a snug fit on the sen-
sor tube, use the heat transfer paste . Apply paste to the sides
of the sensor and place a pea-sized globule on the sensor tip .
Push the sensor into the well and when it bottoms out, press
firmly . The paste will be forced up the sides of the well .
Conduit Connection
The Universal Sensor and Universal Sensor Enclosure 080
(sold separately) are specifically designed to mount onto a
⁄
" ID temperature well that is supplied with an end groove .
3
8
To install the well, plumb a 'tee' into the pipe and fix the well
into the 'tee' . The 080 enclosure has a
must be removed and fitted over the temperature well . The
Universal Sensor is then inserted into the well and the retaining
clip supplied with the enclosure is snapped onto the well end
groove . If the well has a threaded end, the installer must sup-
ply a standard threaded conduit retaining ring . The two wires
from the sensor are connected to the terminal block provided
in the enclosure . The other side of the terminal block is used to
connect wires from the control .
Retaining
Clip
Universal
Sensor
Sensor
Well
Ref In Gnd
Outdoor
Pressure Sens
Sensor
1
2 3
4
5
For product literature:
Pour la documentation
du produit:
⁄
" back knockout that
7
8
tekmarControls.com
tektra 1150-02
Designed and assembled
in Canada
H2065A
Universal
Bottom of
Sensor
Enclosure 080
Cable Tie
Ref In Gnd
Outdoor
Cond
Pressure Sens
Sensor
Sensor
1
2 3
4
5
6
7
Cond
Aux
DHW
Sensor
Sensor
+
Cal
6
7
8
9
10
1
Aux
DHW
Sensor
+
Call
8
9
10
11
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